JPS62206914A - Band pass filter - Google Patents
Band pass filterInfo
- Publication number
- JPS62206914A JPS62206914A JP4739886A JP4739886A JPS62206914A JP S62206914 A JPS62206914 A JP S62206914A JP 4739886 A JP4739886 A JP 4739886A JP 4739886 A JP4739886 A JP 4739886A JP S62206914 A JPS62206914 A JP S62206914A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- pattern
- printed board
- attenuation pole
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 abstract description 4
- 238000003780 insertion Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
Landscapes
- Filters And Equalizers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、無線装置等に使用する帯域フィルタに関する
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bandpass filter used in wireless devices and the like.
（従来の技術）
従来、無線装置等に使用する帯域フィルタは第２図に示
すように構成されていた。すなわち、第２図（ａ）に示
すようにコイル素子Ｌｉとコンデンサ素子Ｃ□とからな
る並列共振回路を、図示しないシールドケース等に収容
し、その接続端子Ａ、Ａ’を、第２図（ｂ）のような回
路パターン１およびアースパターン２を有するプリント
基板の端子挿入孔Ｂ、Ｂ’に対応させて挿入接続して構
成しており、その場合の帯域フィルタとしての周波数選
択度特性は第２図（ｃ）に示すような単峰のものであっ
た・
（発明が解決しようとする問題点）
しかし、このように構成する従来の帯域フィルタは、並
列共振回路の通過周波数以外の特定の周波数を特に減衰
させたい場合、その並列共振回路に他のコイル素子を直
列に接続追加するなどして素子を増やさなければならな
い面倒な欠点があった。(Prior Art) Conventionally, a bandpass filter used in a wireless device or the like has been configured as shown in FIG. That is, as shown in FIG. 2(a), a parallel resonant circuit consisting of a coil element Li and a capacitor element C□ is housed in a shield case (not shown), and its connecting terminals A and A' are connected as shown in FIG. The circuit pattern 1 and ground pattern 2 shown in b) are inserted and connected in correspondence with the terminal insertion holes B and B' of a printed circuit board, and the frequency selectivity characteristic as a bandpass filter in this case is as follows. (Problem to be solved by the invention) However, the conventional bandpass filter configured in this way has a single peak as shown in Figure 2 (c). If you particularly want to attenuate the frequency, you have to increase the number of elements by connecting other coil elements in series to the parallel resonant circuit, which is a troublesome drawback.
本発明は上記した従来の帯域フィルタの欠点を解決する
ことを目的とするもので、帯域フィルタの周波数選択度
特性の特定の周波数に、共振回路素子数を増加すること
なく減衰極を形成することを可能にした帯域フィルタを
提供するものである。The present invention aims to solve the above-mentioned drawbacks of the conventional bandpass filter, and it is possible to form an attenuation pole at a specific frequency of the frequency selectivity characteristic of the bandpass filter without increasing the number of resonant circuit elements. This provides a bandpass filter that makes it possible to
（問題点を解決するための手段）
本発明は上記の問題点を解決するため、並列共振回路を
接続するプリント基板上に微小インダクタンスのコイル
をパターン形成し、それを上記並列共振回路の一方の端
子に接続して、直列共振回路を構成するものである。(Means for Solving the Problems) In order to solve the above problems, the present invention forms a pattern of a coil of minute inductance on a printed circuit board to which parallel resonant circuits are connected, and connects it to one side of the parallel resonant circuits. It is connected to a terminal to form a series resonant circuit.
（作 用）
」二記のように構成することにより、並列共振回路とプ
リント基板上に導体パターンにより形成したパターンコ
イルとで直列共振回路が形成され、その直列共振回路の
共振周波数において周波数選択度特性に減衰極が現れ、
しかも直列共振周波数はパターンコイルの設定によって
変更できるから。(Function) By configuring as described in Section 2, a series resonant circuit is formed by the parallel resonant circuit and the pattern coil formed by the conductor pattern on the printed circuit board, and the frequency selectivity is increased at the resonant frequency of the series resonant circuit. An attenuation pole appears in the characteristics,
Moreover, the series resonance frequency can be changed by setting the pattern coil.
減衰極の周波数が容易に変更可能な利点がある。There is an advantage that the frequency of the attenuation pole can be easily changed.
（実施例） 以下、本発明を実施例により図面を用いて説明する。(Example) Hereinafter, the present invention will be explained with reference to examples and drawings.
第１図は本発明の一実施例の構成を示し、（ａ）図は帯
域フィルタの回路構成を示し、Ｌ２はコンデンサ素子Ｃ
８、コイル素子Ｌ工で構成した並列共振回路に直接接続
されるコイルである。このコイルＬ２は（ｂ）図にプリ
ント基板上のプリントパターンを示すように、プリント
パターンとして形成するパターンコイルｌ、／ として
形成され、（ａ）図の接続端子Ａ、Ａ’は、それに対応
する端子挿入孔Ｂ。FIG. 1 shows the configuration of an embodiment of the present invention, (a) shows the circuit configuration of a bandpass filter, and L2 is a capacitor element C.
8. This is a coil that is directly connected to a parallel resonant circuit made up of coil elements L. This coil L2 is formed as a pattern coil l, / formed as a printed pattern as shown in the printed pattern on the printed circuit board in figure (b), and the connection terminals A and A' in figure (a) correspond to it. Terminal insertion hole B.
Ｂ′に挿入接続される。It is inserted and connected to B'.
このようにして形成するパターンコイルＬ２′ により
、その周波数選択度特性は（ｅ）図のように減衰極Ｓが
形成される。The pattern coil L2' thus formed forms an attenuation pole S in its frequency selectivity characteristic as shown in FIG.
（発明の効果）
以上、説明して明らかなように本発明は、プリント基板
上にパターンコイルを形成させ、そのパターンコイルを
プリント基板上に設けるコイル素子およびコンデンサ素
子による並列共振回路に直列に接続して直列共振回路を
構成させ、それにより周波数選択度特性に減衰極を得る
ものであるから、プリント基板上の素子数を増加するこ
となく容易に減衰極が形成され、不要な周波数を除去す
ることが安価、簡単に可能になる９(Effects of the Invention) As is clear from the above description, the present invention forms a patterned coil on a printed circuit board, and connects the patterned coil in series to a parallel resonant circuit including a coil element and a capacitor element provided on the printed circuit board. A series resonant circuit is constructed, thereby obtaining an attenuation pole in the frequency selectivity characteristic, so the attenuation pole can be easily formed without increasing the number of elements on the printed circuit board, and unnecessary frequencies can be removed. becomes possible cheaply and easily9
第１図は本発明の詳細な説明図で、（ａ） 、 （ｂ）
および（ｃ）図それぞれは、帯域フィルタ回路図、プリ
ント基板上のパターンコイル図、および周波数選択度特
性図であり、第２図は従来の帯域フィルタを示す図で、
（ａ）、（ｂ）および（ｃ）図はそれぞれ、帯域フィル
タ回路図、プリント基板上の端子接続パターン図、およ
び周波数選択度特性図である。
Ｃ工・・・コンデンサ素子、Ｌｌ・・・コイル素子、し
２′・・・パターンコイル、Ａ、Ａ’・・・接続端子、
Ｂ、Ｂ’・・・端子挿入孔。
Ｓ ・・・減衰極、 １ ・・・回路パターン、２ ・
・・アースパターン。
特許出願人 松下電器産業株式会社
第１図
（ａ）
（ｂ）
（Ｃ）FIG. 1 is a detailed explanatory diagram of the present invention, (a), (b)
and (c) are respectively a bandpass filter circuit diagram, a pattern coil diagram on a printed circuit board, and a frequency selectivity characteristic diagram, and FIG. 2 is a diagram showing a conventional bandpass filter.
Figures (a), (b), and (c) are a bandpass filter circuit diagram, a terminal connection pattern diagram on a printed circuit board, and a frequency selectivity characteristic diagram, respectively. C... Capacitor element, Ll... Coil element, 2'... Pattern coil, A, A'... Connection terminal,
B, B'...Terminal insertion hole. S: Attenuation pole, 1: Circuit pattern, 2:
...Earth pattern. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1 (a) (b) (C)
Claims (1)
よる並列共振回路を形成し、これに上記プリント基板上
にパターンコイルとして形成したコイルを、直列接続し
たことを特徴とする帯域フィルタ。1. A bandpass filter characterized in that a parallel resonant circuit is formed on a printed circuit board by a coil element and a capacitor element, and a coil formed as a pattern coil on the printed circuit board is connected in series to the parallel resonant circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4739886A JPS62206914A (en) | 1986-03-06 | 1986-03-06 | Band pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4739886A JPS62206914A (en) | 1986-03-06 | 1986-03-06 | Band pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62206914A true JPS62206914A (en) | 1987-09-11 |
Family
ID=12774007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4739886A Pending JPS62206914A (en) | 1986-03-06 | 1986-03-06 | Band pass filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62206914A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5157362A (en) * | 1988-06-14 | 1992-10-20 | Andrew F. Tresness | Narrow band notch filter with extended passband |
| WO2006022098A1 (en) * | 2004-08-27 | 2006-03-02 | Murata Manufacturing Co., Ltd. | Lc composite component |
| US7079644B1 (en) | 1998-01-14 | 2006-07-18 | Murata Manufacturing Co., Ltd. | Input-output balanced filter |
-
1986
- 1986-03-06 JP JP4739886A patent/JPS62206914A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5157362A (en) * | 1988-06-14 | 1992-10-20 | Andrew F. Tresness | Narrow band notch filter with extended passband |
| US7079644B1 (en) | 1998-01-14 | 2006-07-18 | Murata Manufacturing Co., Ltd. | Input-output balanced filter |
| US7113588B2 (en) | 1998-01-14 | 2006-09-26 | Murata Manufacturing Co., Ltd. | Input-output balanced filter |
| WO2006022098A1 (en) * | 2004-08-27 | 2006-03-02 | Murata Manufacturing Co., Ltd. | Lc composite component |
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